Drupal 6 site + Facebook new Graph API intros?

I'd like to integrate one of my Drupal site with Facebook API. One of my questions is:

• after a user login my Drupal site
• how can my s开发者_如何学运维ite tell whether the user:
  1. has Liked one of my Drupal pages or not
  2. and redirect the user to a different page based on Liked/Not yet Liked

Thanks!

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You can use "Facebook Connect" module for easing connection to facebook. After this you can use graph api:

$fb = facebook_client();
$response = $fb->api('/me/likes');
print_r($response);